Try to load metastore from ENV if no config file is specified (#84)

Author: rampage644

crates/api-snowflake-rest/src/server/core_state.rs

@@ -24,6 +24,7 @@ pub struct CoreState {
 pub enum MetastoreConfig {
     ConfigPath(PathBuf),
     ConfigJson(String),
+    Env,
     DefaultConfig,
     None,
 }
@@ -70,6 +71,14 @@ async fn apply_metastore_bootstrap_config(
     metastore_bootstrap_config: MetastoreConfig,
 ) -> Result<()> {
     match metastore_bootstrap_config {
+        MetastoreConfig::Env => {
+            tracing::info!("Bootstrapping metastore from environment");
+            let config = MetastoreBootstrapConfig::load_from_env().context(MetastoreConfigSnafu)?;
+            config
+                .apply(metastore.clone())
+                .await
+                .context(MetastoreConfigSnafu)?;
+        }
         MetastoreConfig::ConfigPath(path) => {
             tracing::info!(
                 path = %path.display(),

crates/embucket-lambda/src/main.rs

@@ -85,7 +85,7 @@ impl LambdaApp {
         let metastore_cfg = if let Some(config_path) = &config.metastore_config {
             MetastoreConfig::ConfigPath(config_path.clone())
         } else {
-            MetastoreConfig::None
+            MetastoreConfig::Env
         };
 
         let metastore_settings_config = MetastoreSettingsConfig::default()

crates/embucketd/src/main.rs

@@ -141,7 +141,7 @@ async fn async_main(
     let metastore_cfg = if let Some(config_path) = &opts.metastore_config {
         MetastoreConfig::ConfigPath(config_path.clone())
     } else {
-        MetastoreConfig::None
+        MetastoreConfig::Env
     };
     let core_state = CoreState::new(
         execution_cfg,